摘要
老君山正长岩锆石SHRIMP定年结果为34.8±1.6Ma(2σ),MSWD=0.38(可信度为0.96),相当于渐新世,属于喜马拉雅期。通过锆石定年分析结果对其成岩时代及锆石的成因进行探讨。
Laojunshan syenite lies in the south segment of the Cenozoic potassic alkaline magmatic rock in Ailaos- han- Jinshajiang river. The SHRIMP zircon U - Pb dating results of Laojunshan Syenite are 34.8 ± 1.6Ma（2σ）, MSWD = 0.38 （ probability = 0.96）, which is consistant with the Oligocene epoch, belonging to Himalayas period. We will discuss its formation age of rocks and the cause formation of zircon by the SHRIMP zircon U - Pb analytical results of Laojunshan Syenite.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2005年第4期522-526,共5页
Geotectonica et Metallogenia
基金
中国科学院知识创新工程重要方向项目(KZCX2-SW-117)
国家自然科学基金项目(40072022)资助.
